81252935484 has 48 divisors (see below), whose sum is σ = 216714935808. Its totient is φ = 23210791488.

The previous prime is 81252935479. The next prime is 81252935501. The reversal of 81252935484 is 48453925218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376762 + ... + 551774.

It is an arithmetic number, because the mean of its divisors is an integer number (4514894496).

Almost surely, 2^81252935484 is an apocalyptic number.

81252935484 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

81252935484 is an abundant number, since it is smaller than the sum of its proper divisors (135462000324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81252935484 is a wasteful number, since it uses less digits than its factorization.

81252935484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180554 (or 180552 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 51.

The spelling of 81252935484 in words is "eighty-one billion, two hundred fifty-two million, nine hundred thirty-five thousand, four hundred eighty-four".